I've transported 3 of my cabinets on their back in the bed of my truck (with shell), and I was dismayed to find out that my DKJr cabinet wouldn't fit on it's back (damn control panel was about 1" too tall, so it had to go on it's SIDE.
All made it here without issue...though I did make sure that they all had secure monitors...well, all but one, and that one's monitor was holding on by a friggin' thread (hence my LEARNING and checking from then on).